Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

Characteristic	Locus
Inheritance	object ObservableBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> PollingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> > Ens160
Implements	IObservable<IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>> ISamplingSensor<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> ISensor<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> IDisposable IConcentrationSensor ISamplingSensor<Concentration> ISensor<Concentration> II2cPeripheral
Inherited Members	ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Init(int, int) ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Dispose(bool) ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Dispose() ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.BusComms ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.ReadBuffer ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.WriteBuffer PollingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.StartUpdating(TimeSpan?) PollingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.StopUpdating() SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.samplingLock SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.ReadSensor() SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.RaiseEventsAndNotify(IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>) SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Read() SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.SamplingTokenSource SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Conditions SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.IsSampling SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.UpdateInterval SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Updated ObservableBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.NotifyObservers(IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>) ObservableBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.Subscribe(IObserver<IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>>) ObservableBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.CreateObserver(Action<IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>>, Predicate<IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>>) ObservableBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.observers object.Equals(object) object.Equals(object, object) object.GetHashCode() object.GetType() object.MemberwiseClone() object.ReferenceEquals(object, object) object.ToString()
Namespace	Meadow.Foundation.Sensors.Environmental
Assembly	Ens160.dll

Syntax

public class Ens160 : ByteCommsSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>, IObservable<IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>>, ISamplingSensor<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>, ISensor<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>, IDisposable, IConcentrationSensor, ISamplingSensor<Concentration>, ISensor<Concentration>, II2cPeripheral

Constructors

Ens160(II2cBus, byte)

Create a new ENS160 object

Declaration

public Ens160(II2cBus i2cBus, byte address = 82)

Parameters

Type	Name	Description
II2cBus	i2cBus	The I2C bus
byte	address	The I2C address

Remarks

The constructor sends the stop periodic updates method otherwise the sensor may not respond to new commands

Properties

CO2Concentration

The current C02 concentration value

Declaration

public Concentration? CO2Concentration { get; }

Property Value

Type	Description
Concentration?

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

Concentration

The current C02 concentration value

Declaration

public Concentration? Concentration { get; }

Property Value

Type	Description
Concentration?

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

CurrentOperatingMode

The current device operating mode

Declaration

public Ens160.OperatingMode CurrentOperatingMode { get; set; }

Property Value

Type	Description
Ens160.OperatingMode

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

DefaultI2cAddress

The default I2C address for the peripheral

Declaration

public byte DefaultI2cAddress { get; }

Property Value

Type	Description
byte

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

EthanolConcentration

The current ethanol concentration value

Declaration

public Concentration? EthanolConcentration { get; }

Property Value

Type	Description
Concentration?

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

TVOCConcentration

The current Total Volatile Organic Compounds (TVOC) concentration value

Declaration

public Concentration? TVOCConcentration { get; }

Property Value

Type	Description
Concentration?

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

Methods

GetAirQualityIndex()

Get the air quality index (AQI)

Declaration

public Ens160.UBAAirQualityIndex GetAirQualityIndex()

Returns

Type	Description
Ens160.UBAAirQualityIndex

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

GetDeviceID()

Get the sensor ID from PART_ID register Default value is 0x0160 (352)

Declaration

public ushort GetDeviceID()

Returns

Type	Description
ushort	ID as a ushort (2 bytes)

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

GetFirmwareVersion()

Get the sensor app / firmware version

Declaration

public (byte Major, byte Minor, byte Release) GetFirmwareVersion()

Returns

Type	Description
(byte Major, byte Minor, byte Release)	The major, minor, release values as a ttuple of bytes

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

GetHumidity()

Get the relative humidity used in its calculations -b taken from RH_IN if supplied

Declaration

public RelativeHumidity GetHumidity()

Returns

Type	Description
RelativeHumidity

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

GetTemperature()

Get the temperature used for calculations - taken from TEMP_IN if supplied

Declaration

public Temperature GetTemperature()

Returns

Type	Description
Temperature	Temperature

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

Initialize()

Initialize the sensor

Declaration

protected Task Initialize()

Returns

Type	Description
Task

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

RaiseEventsAndNotify(IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>)

Raise change events for subscribers

Declaration

protected override void RaiseEventsAndNotify(IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> changeResult)

Parameters

Type	Name	Description
IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>	changeResult	The change result with the current sensor data

Overrides

SamplingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.RaiseEventsAndNotify(IChangeResult<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>)

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

ReadSensor()

Get Scdx40 C02 Gas Concentration and Update the Concentration property

Declaration

protected override Task<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)> ReadSensor()

Returns

Type	Description
Task<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>

Overrides

Meadow.Foundation.SamplingSensorBase<(Meadow.Units.Concentration? CO2Concentration, Meadow.Units.Concentration? EthanolConcentration, Meadow.Units.Concentration? TVOCConcentration)>.ReadSensor()

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

Reset()

Reset the sensor

Declaration

public Task Reset()

Returns

Type	Description
Task

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

SetHumidity(RelativeHumidity)

Set relative humidity

Declaration

public void SetHumidity(RelativeHumidity humidity)

Parameters

Type	Name	Description
RelativeHumidity	humidity

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

SetTemperature(Temperature)

Set ambient temperature

Declaration

public void SetTemperature(Temperature ambientTemperature)

Parameters

Type	Name	Description
Temperature	ambientTemperature

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

StartUpdating(TimeSpan?)

Starts updating the sensor on the updateInterval frequency specified

Declaration

public override void StartUpdating(TimeSpan? updateInterval = null)

Parameters

Type	Name	Description
TimeSpan?	updateInterval

Overrides

PollingSensorBase<(Concentration? CO2Concentration, Concentration? EthanolConcentration, Concentration? TVOCConcentration)>.StartUpdating(TimeSpan?)

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

StopUpdating()

Stop updating the sensor The sensor will not respond to commands for 500ms The call will delay the calling thread for 500ms

Declaration

public override void StopUpdating()

Overrides

Meadow.Foundation.PollingSensorBase<(Meadow.Units.Concentration? CO2Concentration, Meadow.Units.Concentration? EthanolConcentration, Meadow.Units.Concentration? TVOCConcentration)>.StopUpdating()

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

Events

CO2ConcentrationUpdated

Raised when the CO2 concentration changes

Declaration

public event EventHandler<IChangeResult<Concentration>> CO2ConcentrationUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Concentration>>

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

ConcentrationUpdated

Raised when the CO2 concentration changes

Declaration

public event EventHandler<IChangeResult<Concentration>> ConcentrationUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Concentration>>

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

EthanolConcentrationUpdated

Raised when the ethanol concentration changes

Declaration

public event EventHandler<IChangeResult<Concentration>> EthanolConcentrationUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Concentration>>

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub

TVOCConcentrationUpdated

Raised when the Total Volatile Organic Compounds (TVOC) concentration changes

Declaration

public event EventHandler<IChangeResult<Concentration>> TVOCConcentrationUpdated

Event Type

Type	Description
EventHandler<IChangeResult<Concentration>>

Remarks

Ens160
Status
Source code	GitHub
Datasheet(s)	GitHub
NuGet package

Code Example

Ens160 sensor;

public override Task Initialize()
{
    Resolver.Log.Info("Initializing...");

    var i2cBus = Device.CreateI2cBus(Meadow.Hardware.I2cBusSpeed.Standard);

    sensor = new Ens160(i2cBus, (byte)Ens160.Addresses.Address_0x53);


    var consumer = Ens160.CreateObserver(
        handler: result =>
        {
            Resolver.Log.Info($"Observer: C02 concentration changed by threshold; new: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
        },
        filter: result =>
        {
            if (result.Old?.CO2Concentration is { } oldCon &&
                result.New.CO2Concentration is { } newCon)
            {
                return Math.Abs((newCon - oldCon).PartsPerMillion) > 10;
            }
            return false;
        }
    );

    sensor?.Subscribe(consumer);

    if (sensor != null)
    {
        sensor.Updated += (sender, result) =>
        {
            Resolver.Log.Info($"  CO2 Concentration: {result.New.CO2Concentration?.PartsPerMillion:N0}ppm");
            Resolver.Log.Info($"  Ethanol Concentration: {result.New.EthanolConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  TVOC Concentration: {result.New.TVOCConcentration?.PartsPerBillion:N0}ppb");
            Resolver.Log.Info($"  AQI: {sensor.GetAirQualityIndex()}");
        };
    }

    sensor?.StartUpdating(TimeSpan.FromSeconds(2));

    return base.Initialize();
}

Sample project(s) available on GitHub